<template>
  <div id="login_container">
      <div class="login_box">
        <!-- 头像区域 -->
        <div class="login_box_head">
          <img src="../assets/img/lufei.jpg" alt="">
        </div>
        <!-- 登录表单区域 -->
        <el-form label-width="0px" class="login_form" ref="loginFormRef" :model="loginForm" :rules="loginFormRules">
          <!-- 用户名 -->
          <el-form-item prop="username">
            <el-input v-model="loginForm.username" prefix-icon="el-icon-user"></el-input>
          </el-form-item>
          <!-- 密码 -->
          <el-form-item prop="password">
            <el-input v-model="loginForm.password" prefix-icon="el-icon-lock" type="password"></el-input>
          </el-form-item>
          <!-- 按钮 -->
          <el-form-item class="btns">
             <el-button type="primary" @click="login()">登录</el-button>
              <el-button type="info" @click="resetLoginForm()">重置</el-button>
          </el-form-item>
         </el-form>
        
      </div>
  </div>  
</template>

<script>
export default {
  name: 'Login',
  data() {
    return {
      // 绑定数据
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 校验数据规则
      loginFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 9, message: '长度在 3 到 9 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 3, max: 11, message: '长度在 3 到 11 个字符', trigger: 'blur' }
        ]
      }
      
      
    }

  },
  methods: {
    // 重置表单
    resetLoginForm() {
      // console.log(this)
      this.$refs.loginFormRef.resetFields()
       
    },

    login() {
      this.$refs.loginFormRef.validate(async valid => {
        // console.log(valid)
        if(!valid) return;
        const { data: res } = await this.$http.post('login',this.loginForm)
        if(res.meta.status !== 200) {
           this.$message.error('登录失败');
        }else {
          this.$message.success('登录成功')
          // 1.将登录成功的token，保存到客户端的sessionStorage中
              //  1.1项目中除了登录之外的其他API接口，必须在登录之后才能访问
               // 1.2token只应在当前网页打开期间生效，所以将token保存在sessionStorage中
            window.sessionStorage.setItem("token", res.data.token)
            // 2.通过路由跳转到后台主页
            this.$router.push("/home")
          
        }
      })
    }
  }
}
</script>

<style Lang="less" scoped>
  #login_container {
    height: 100%;
    background-color: #2b4b6b;
  }
  .login_box {
    width: 400px;
    height: 350px;
    background-color: #fff;
    position: absolute;
    top: 50%;
    left: 50%;
    margin-top: -175px;
    margin-left: -200px;
    border-radius: 3px;
    
    
  }
  .login_box_head {
    width: 130px;
    height: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    position: absolute;
    left: 50%;
    transform: translate(-50%,-50%);
    background-color: #fff;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
  }
  .login_box_head img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    
  }
  .login_form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 10px;
    box-sizing: border-box;
  }
  .btns {
    display: flex;
    justify-content: flex-end;
  }
</style>